Maths practice for 12-year-olds - page 271 of 362
Number of problems found: 7228
- Exchanged 4627
Mr. Sova had a plot of land with an area of 3600 m². However, he exchanged it for another square plot, which was 5 m larger. How many m² does the larger land now have? - Working together on project
Two employees did working on the project. First, make it alone for 20 days, the second for 24 days. How many days will it take to complete the project if five days they work together, then first will take two days holiday, and after returning they complet - Certificate 4615
Maroš received hockey cards as a reward after his certificate. The number of cards he received is twice the sum of the marks on his report card. Maroš has 8 subjects, and his average grade on his report card was 1.75. How many hockey cards did Maroš get? - Three-quarters 4613
Matej deposits k euros in the bank per month. After each year, the bank credits him with three-quarters of the monthly deposit. How many euros will Matěj have in his account after a / year, b / y years? - Alley
Alley measured a meters. At the beginning and end are planted poplar. How many must we plant poplars to get the distance between the poplars 15 meters? - Failure
Drivers of passenger cars have calculated that at a speed of 60 km/h, they arrive at their destination within 40 minutes. After 20 km, refrain for five minutes due to a technical failure. How fast must it go the rest of the way to the finish at the schedu - Kilometers 4604
The tourist traveled 78 km in three hours. For part of the journey, he traveled by bus at an average speed of 30 km/h, and for the rest, he walked at an average speed of 6 km/h. How long did he walk, and how many kilometers did he walk?
- Lengths 4599 The garden is 9m long and is no wider than 10m. What is its width if you can walk the same 55cm or 70cm lengths?
- Together 4596 Pavel has half as much savings as Standa but the same savings as Radek. Standa saved CZK 120 less than Radek. What savings do all three boys have together? A) less than CZK 600 B) CZK 600 C) CZK 960 D) 1200 CZK E) another number of crowns
- Z7-I-4 stars 4949
Write instead of stars digits, so the next write of the product of the two numbers is valid: ∗ ∗ ∗ · ∗ ∗ ∗ ∗ ∗ ∗ ∗ 4 9 4 9 ∗ ∗ ∗ ∗ ∗ ∗ 4 ∗ ∗ - The rope
A 68-centimeter-long rope is used to make a rhombus on the ground. The distance between a pair of opposite side corners is 16 centimeters. What is the distance between the other two corners? - Diameter to area
Find the area of the circle whose diameter is 26 cm. - Cinema 4584
There are 15 seats in the cinema. If we know the number of seats, we will say that there are more than 390 but less than 410. - Calculate - sphere
Calculate the surface and volume of the sphere if its radius r = 5 cm. - Calculate 4580
Calculate the surface and volume of the sphere if the diameter d = 6.5dm.
- Procedure 4578
I have to construct a triangle - procedure and solution side a = 7cm angle β = 40 median to side c: tc = 5cm - Coolant
The driver filled the car coolant with a mixture of 3.9 liters and 2.6 liters of water antifreeze coolant. At what rate are these two components mixed? - Rectangular 4567 The rectangular flower garden fencing is 57.6 m long. If you know its dimensions are in a 5:7 ratio, find them.
- The farmer
The farmer brought potatoes to the market. In the first hour, he sold two-fifths of the potatoes brought in. He sold five-sixths of the remaining potatoes in the second hour, and in the third hour, he sold the last 40 kg of potatoes. 1. Express a fraction - Strawberries 4564
Ten temporary workers collect 50 kg of strawberries per day. How many kilograms of strawberries do seven temporary workers collect per day?
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